Improper Cold-pressing Needle Crimping Can Cause Embrittlement Of Insulating Sleeves.

The crimp contact crimping process directly affects the mechanical and electrical properties of the components. If the crimping operation of crimp contact pin deviates from the standard requirements, an undesirable mechanical contact surface will be formed between the metal terminal and the cable. Under this condition, after long-term operation, the insulating sleeve will gradually harden or even become brittle, reducing the overall durability of the connection.

During the crimping process, incorrect contact socket crimp positioning or force distribution can cause the terminal insulating sleeve to be subjected to abnormal stress. Under temperature cycling or vibration, these stress concentration areas are more prone to microcracks, and the accumulated damage to the internal structure of the material evolves into visible embrittlement and fracture over time. Failure to follow industry standards during manufacturing and assembly is often a significant factor leading to this problem.

As part of the connection system, the geometry of the crimp contact female and the settings of the crimping tool must be compatible with the wire gauge specifications being crimped. Mismatched cutting edges or crimping dies will cause abnormal deformation of the insulation layer, affecting the original elastic recovery characteristics of the material and accelerating the aging of the sleeve.